#include <iostream>
using namespace std;

template <typename T>
void mySwap(T &t1,T &t2) {
    T temp = t1;
    t1 = t2;
    t2 = temp;
}

int main() {
    int a = 3;
    int b = 4;
    mySwap(a,b);
    cout<<a<<"\t"<<b<<endl;
}